PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

33771Cock,plug

Parker Hannifin Corporation Div Aerospace Group Headquarters · NSN 4820-00-546-7350 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-00-546-7350 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-546-7350. Primary manufacturer part number: 33771.
Features
  • Cock,plug — FSC 4820
  • Seat Angle: 37.0 DEGREES FIRST END
  • Thread Series Designator: UNF FIRST END
  • Connection Style: FLARED (TUBE) FIRST END
  • Connection Type: THREADED EXTERNAL TUBE FIRST END
  • Thread Quantity Per Inch: 20 FIRST END
  • Thread Class: 3A FIRST END A
  • Nominal Outside Diameter Tube Accommodated: 0.250 INCHES FIRST END IN
Applications
  • Flow control in piping systems
  • Water treatment infrastructure
  • Industrial process control
General Description

The Cock,plug, cataloged under National Stock Number 4820-00-546-7350, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Parker Hannifin Corporation Div Aerospace Group Headquarters. Government technical data includes 11 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-00-546-7350
Primary Part Number33771
Item NameCock,plug
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerParker Hannifin Corporation Div Aerospace Group Headquarters
StatusACTIVE
Seat Angle37.0 DEGREES FIRST END
Thread Series DesignatorUNF FIRST END
Connection StyleFLARED (TUBE) FIRST END
Connection TypeTHREADED EXTERNAL TUBE FIRST END
Thread Quantity Per Inch20 FIRST END
Thread Class3A FIRST END A
Nominal Outside Diameter Tube Accommodated0.250 INCHES FIRST END IN
Maximum Operating Temp160.0 FAHRENHEIT SINGLE RESPONSE DEGF
Flow StyleTWO WAY TWO PORT 90 DEGREE PLUG TURN
Thread DirectionRIGHT-HAND FIRST END
Nominal Thread Size0.437 INCHES FIRST END IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 3
4920-00-867-59653377-1 INTERCHANGEABLE
Test Stand,hydraulic System Comp
King Nutronics Corporation Dba King Nutronics
5133-00-988-570818677 OLE PRO INTERCHANGEABLE
Drill,twist
General Services Administration Federal Supply Service
2910-01-595-656104-21990 INTERCHANGEABLE
Filter Element,fluid
Department of Defense Project Manager-Mobile Electric Power
Cross-Reference Index
Part NumberManufacturer
633797-4 Lockheed Martin Corp (USA)
33771 PRIMARY Parker Hannifin Corporation Div Aerospace Group Headquarters (USA)
Related Parts
4920-00-867-5965INTERCHANGEABLE
TEST STAND,HYDRAULIC SYSTEM COMP
3377-1
5133-00-988-5708INTERCHANGEABLE
DRILL,TWIST
18677 OLE PRO
2910-01-595-6561INTERCHANGEABLE
FILTER ELEMENT,FLUID
04-21990

Frequently Asked Questions

What is NSN 4820-00-546-7350?

NSN 4820-00-546-7350 is a Cock,plug, manufactured by Parker Hannifin Corporation Div Aerospace Group Headquarters, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-00-546-7350?

NSN 4820-00-546-7350 has 2 cross-referenced part numbers: 633797-4 (Lockheed Martin Corp), 33771 (Parker Hannifin Corporation Div Aerospace Group Headquarters).

What NSN replaces 4820-00-546-7350?

There are 3 known substitutes for 4820-00-546-7350: 4920-00-867-5965, 5133-00-988-5708, 2910-01-595-6561. Verify interchangeability with system specifications before substitution.

What are the specifications of 33771?

Key specifications for 33771: Seat Angle: 37.0 DEGREES FIRST END; Thread Series Designator: UNF FIRST END; Connection Style: FLARED (TUBE) FIRST END; Connection Type: THREADED EXTERNAL TUBE FIRST END. 11 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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